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NTAP-20261021-0019 — CVE-2026-34743 XZ Utils Vulnerability in NetApp Products

Published 2026-10-21 · Updated 2026-10-21 · Status: Interim · Exploitation: Public · Severity: MEDIUM 5.3 · ONTAP affected: Yes

Official advisory: NTAP-20261021-0019 on security.netapp.com ↗. Affected versions, fixed releases, and workarounds live there — this page is a summary.

Product family: NetApp Console / BlueXP · Other NetApp products · SolidFire / NetApp HCI · ONTAP · SnapCenter | ONTAP-relevant | highest CVSS: 5.3

CVEs in this advisory

CVE-2026-34743 — MEDIUM · CVSS 5.3 · site index

What the CVE records say

CVE-2026-34743 — XZ Utils provide a general-purpose data-compression library plus command-line tools. Prior to version 5.8.3, if lzma_index_decoder() was used to decode an Index that contained no Records, the resulting lzma_index was left in a state where where a subsequent lzma_index_append() would allocate too little memory, and a buffer overflow would occur. This issue has been patched in version 5.8.3.

Impact

Successful exploitation of this vulnerability could lead to Denial of Service (DoS).

Affected products

NetApp Console Agent
NetApp Console Agent Container (cadvisor)
NetApp Shift Toolkit
NetApp SolidFire & HCI Management Node
ONTAP tools for VMware vSphere 10
SnapCenter Plug-in for VMware vSphere

References

https://github.com/tukaani-project/xz/security/advisories/GHSA-x872-m794-cxhv ↗

What to do

Check the affected products listed above against the official advisory's affected-versions table — that is where the exact ONTAP 9 release, ONTAP tool, or management product versions are named.
If affected and a fixed release exists, plan the upgrade — see the ONTAP upgrade runbook.
If exploitation is listed as "active", treat remediation as urgent and review exposure (management LIFs, ONTAP S3, SnapMirror endpoints).
Harden in parallel: security hardening baseline and ransomware protection on ONTAP.